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## Re: [TowerTalk] On the phase shift in current between ends of a coil

 To: Re: [TowerTalk] On the phase shift in current between ends of a coil "Mark Beckwith" Sun, 23 Nov 2003 08:01:19 -0600
 ```Phase Shift? This thread would have made me cross-eyed if I had studied it so I have not been following it. Nevertheless this excerpt caught my eye: >A lumped model serves as a decent design >tool to determine a starting point, which >will have to be further iterated empirically. I like to use AO/YO to design yagis, but I needed my 40M antennas to have elements no longer than 60 feet because of the guy wires above where they're mounted. So I knew I had to load up the elements a little bit. As much faith as I have in AO/YO for plain-ol' monobanders, my confidence goes out the window when you start loading them up. So I used the empirical approach to build these 40s. I modeled a full-sized antenna which gave me the positions of the elements on the booms, worked backwards to determine the resonant frequencies of the elements, then by experimentation adjusted each element until it was resonant at the right frequency, then put the antennas together and put them up. They work well. Anyway, 2 cents worth of practical experience from the woodwork. Mark, N5OT _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
 Current Thread [TowerTalk] On the phase shift in current between ends of a coil, Jim Lux Re: [TowerTalk] On the phase shift in current between ends of a coil, K3BU Re: [TowerTalk] On the phase shift in current between ends of a coil, Jim Lux Re: [TowerTalk] On the phase shift in current between ends of a coil, Mark Beckwith <= Re: [TowerTalk] On the phase shift in current between ends of a coil, Jim Lux